我在使用 ID 148f:5370 Ralink Technology, Corp. RT5370 無線適配器運行 Ubuntu 12.04 盒子時遇到問題。我已經從以下位置下載了最新的資源http://www.mediatek.com/_en/07_downloads/dl.php並透過激活支援來編譯它們：
HAS_WPA_SUPPLICANT=y
HAS_NATIVE_WPA_SUPPLICANT_SUPPORT=y
make 和 make install 運作正常，沒有任何問題。
我還添加到黑名單：
blacklist rt2800usb
blacklist rt2870sta
插入設備時我得到
[ 1625.120102] usb 1-1.2: new high-speed USB device number 7 using ehci_hcd
[ 1625.232103]
[ 1625.232106]
[ 1625.232107] === pAd = ffffc900228ea000, size = 598360 ===
[ 1625.232109]
[ 1625.232241] <-- RTMPAllocAdapterBlock, Status=0
[ 1625.232419] Efuse Size=0x2d [2d0-2fc]
[ 1625.232776] NVM is EFUSE
[ 1625.249500] ADDRCONF(NETDEV_UP): ra0: link is not ready
Syslog 對此進行了一些擴充：
Nov 19 17:27:03 betschwa kernel: [ 1625.120102] usb 1-1.2: new high-speed USB device number 7 using ehci_hcd
Nov 19 17:27:03 betschwa kernel: [ 1625.232103]
Nov 19 17:27:03 betschwa kernel: [ 1625.232106]
Nov 19 17:27:03 betschwa kernel: [ 1625.232107] === pAd = ffffc900228ea000, size = 598360 ===
Nov 19 17:27:03 betschwa kernel: [ 1625.232109]
Nov 19 17:27:03 betschwa kernel: [ 1625.232241] <-- RTMPAllocAdapterBlock, Status=0
Nov 19 17:27:03 betschwa mtp-probe: checking bus 1, device 7: "/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2"
Nov 19 17:27:03 betschwa kernel: [ 1625.232419] Efuse Size=0x2d [2d0-2fc]
Nov 19 17:27:03 betschwa kernel: [ 1625.232776] NVM is EFUSE
Nov 19 17:27:03 betschwa mtp-probe: bus: 1, device: 7 was not an MTP device
Nov 19 17:27:03 betschwa NetworkManager[1092]: SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/net/ra0, iface: ra0)
Nov 19 17:27:03 betschwa NetworkManager[1092]: SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/net/ra0, iface: ra0): no ifupdown configuration found.
Nov 19 17:27:03 betschwa NetworkManager[1092]: <warn> failed to allocate link cache: (-10) Operation not supported
Nov 19 17:27:03 betschwa NetworkManager[1092]: <info> (ra0): driver does not support SSID scans (scan_capa 0x00).
Nov 19 17:27:03 betschwa NetworkManager[1092]: <info> (ra0): using WEXT for WiFi device control
Nov 19 17:27:03 betschwa NetworkManager[1092]: <error> [1384878423.166788] [nm-device-wifi.c:2591] real_update_permanent_hw_address(): (ra0): unable to read permanent MAC address (error 0)
Nov 19 17:27:03 betschwa NetworkManager[1092]: <info> (ra0): new 802.11 WiFi device (driver: 'usb' ifindex: 7)
Nov 19 17:27:03 betschwa NetworkManager[1092]: <info> (ra0): exported as /org/freedesktop/NetworkManager/Devices/6
Nov 19 17:27:03 betschwa NetworkManager[1092]: <info> (ra0): now managed
Nov 19 17:27:03 betschwa NetworkManager[1092]: <info> (ra0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Nov 19 17:27:03 betschwa NetworkManager[1092]: <info> (ra0): bringing up device.
Nov 19 17:27:03 betschwa NetworkManager[1092]: <info> (ra0): deactivating device (reason 'managed') [2]
Nov 19 17:27:03 betschwa NetworkManager[1092]: <warn> (ra0): error 100 getting card mode
Nov 19 17:27:03 betschwa NetworkManager[1092]: <error> [1384878423.168059] [wifi-utils-wext.c:155] wifi_wext_set_mode(): (ra0): error setting mode 2
Nov 19 17:27:03 betschwa kernel: [ 1625.249500] ADDRCONF(NETDEV_UP): ra0: link is not ready
Nov 19 17:27:03 betschwa NetworkManager[1092]: <warn> (ra0): error 100 getting card mode
我還缺什麼？可能有 Ubuntu 的 deb 可用嗎？
答案1
有兩種可能性。第一個是你沒有安裝ralink韌體。嘗試
sudo apt-get install linux-firmware-nonfree
然後關閉電腦，然後重新打開，看看它是否工作。
如果這還不夠，請打開終端，建立一個空目錄，然後發出以下命令：
wget http://www.kernel.org/pub/linux/kernel/projects/backports/stable/v3.12.1/backports-3.12.1-1.tar.bz2
tar xvf backports-3.12.1-1.tar.bz2
cd backports-3.12.1-1
make defconfig-wifi
make
sudo make install
聯合國-blacklist rt2800usb，因為這正是您的模組。關閉你的電腦，然後重新打開，它現在應該可以工作了。您可以透過以下方式檢查
modinfo rt2800usb | grep 148F | grep 5370
應該返回
alias: usb:v148Fp5370d*dc*dsc*dp*ic*isc*ip*in*
如果它不起作用，請將競爭對手模組（您在上面嘗試安裝但未成功安裝的模組）列入黑名單，關閉電腦然後重新打開，希望這次它能起作用。